Liquefaction Vulnerability Analysis as a Coastal Spatial Planning Concept in Pariaman City – Indonesia
Dedi Hermon1, Erianjoni2, Indang Dewata3, Aprizon Putra4, Olivia Oktorie5
1Dedi Hermon Received his PhD Degree from Bogor Agricultural University, Indonesia,
2Erianjoni Received his PhD Degree from Padang State University, Indonesia,
3Indang Dewata Received his PhD Degree from Indonesia University, Indonesia,
4Aprizon Putra Received his M.Sc Degree from Andalas University, Indonesia,
5Olivia Oktorie Received his M.Ed Degree from Padang State University, Indonesia,
Manuscript received on 15 March 2019 | Revised Manuscript received on 21 March 2019 | Manuscript published on 30 July 2019 | PP: 4181-4186 | Volume-8 Issue-2, July 2019 | Retrieval Number: B3265078219/19©BEIESP | DOI: 10.35940/ijrte.B3265.078219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Knowledge about the liquefaction vulnerability in Pariaman city which is prone to an earthquake is very much needed in disaster mitigation based spatial planning. This research was conducted by analyzing the potential of liquefaction vulnerability based on the Conus penetration to produce Microzonation of the susceptibility of subsidence due to liquefaction at 4 locations in Pariaman city, i.e Marunggi village, Taluak village, Pauh Timur village and Padang Birik-Birik village. Based on the results of the analysis using this method, the critical conditions of liquefaction found in the intermediate sandy soil to solid. The fine sand layer which has the potential for liquefaction is in sand units formed from coastal deposits, coastal ridges and riverbanks. This liquefaction vulnerability zones analysis is limited to a depth of 6.00 m due to the limitations of the equipment used. The results of the analysis show that the fine sand layer which has the potential for liquefaction occurs at a depth of> 1.00-6.00 m with the division of zones, i.e 1) High liquefaction in the sandy soil layer which has a critical acceleration (a) <0.10 g with shallow groundwater surface; 2) Intermediate liquefaction in the sandy soil layer which has a critical acceleration (a) between 0.10-0.20 g with shallow groundwater surface; and 3) Low and very low liquefaction in the sandy soil layer which has a critical acceleration (a) between 0.20-0.30 g with an average groundwater deep enough surface.
Index Terms: Disaster mitigation, Earthquake, Liquefaction, Pariaman – Indonesia, Vulnerability.
Scope of the Article: Analysis of Algorithms and Computational Complexity